Cancer. Secondhand smoke is a known risk factor for lung cancer. Some research also suggests a link between secondhand smoke and various other types of cancer.
癌症。众所周知，二手烟是肺癌的致病因素之一，一些研究还表明二手烟与其他癌症也有着千丝万缕的关系。
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The studies did not find, for example, that smoke-free tobacco products were strongly correlated with high blood pressure, a risk factor for heart disease.
比如说，高血压是导致心脏疾病的主要因素，而研究并没有发现无烟烟草制品与高血压有紧密的关联。
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Tobacco smoke is the number one risk factor for lung cancer – and every time it is inhaled, it deals a double blow to lung cells, creating conditions almost ideally suited to the formation of cancer.